Measurement of the shell decompression in direct-drive inertial-confinement-fusion implosions.
basic_science · Level V
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- Record sourced from PubMed, PMID 28618558.
- Also identified by DOI 10.1103/PhysRevE.95.051202.
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Abstract
A series of direct-drive implosions performed on OMEGA were used to isolate the effect of an adiabat on the in-flight shell thickness. The maximum in-flight shell thickness was measured to decrease from 75±2 to 60±2μm when the adiabat of the shell was reduced from 6 to 4.5, but when decreasing the adiabat further (1.8), the shell thickness increased to 75±2μm due to the growth of the Rayleigh-Taylor instability. Hydrodynamic simulations suggest that a laser imprint is the dominant seed for these nonuniformities.